Dump-car construction



Sept. 1e, 1924. 1,508,551

l D. HiNDAHL.

DUMP CAR CONSTRUCTION Filed Jan. 29. 1923 3 Sheets-Sheet 1 lli-0- l? Sept. 16 1924. D. HINDAHL DUMP CAR codqs'fmcMoNI Filed Jan. 29. 1923` 3 Sheets-Sheet 2 Sem. 16 1924.

l 1,508,551 D. HINDHL DUMP CAR CONSTRUCTION Filed Jan 29, 1923 3 Sheets-Sheet 3 Patented Sept. 16, 1924.

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DAVID nrnnAr-IL, on CHICAGO, Immers.

DUMP-CAR CONSTRGTIO.

Application filed January 29, y1923. Serie! No. 815,471.

To all whom t 'may concern:

Be it known that l, DAviD HINDAHL, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful :improvements in Dump-Car Constructions, of which the following is a specification.

The present invention relates to dump car construction.

More particularly the present invention relates to the type of dump car having a hopper provided with doors adapted to open with a rapid movement. The present invention Will be described With reference to the well known type of dump car in Which cooperating doors are adapted to form a hopper, said doors meeting along a line lying substantially in the longitudinal central vertical plane of the car.

An objectof the present invention is to 'provide operating mechanism for the dump doors which will combine eiiciency of operation with safety for the operator.

A further object is to provide dump door opeiating mechanism Which Will permit the doors to dump with a'sustantially instanta-y neous-movement but which Will involve no danger for the operator.

A further object is to provide dump door operating mechanism involving` chain or other flexible means which Will be free f the objection sometimes encountered that the flexible means becomes entangled With the other mechanism of the cai".

Further objects will appear as .the description proceeds. f

Referring to 'the drawings- Figure 1 is a view taken longitudinally of the car, the center portion being broken away to illustrate vthe tvvo ends of the hopper portion of said car;

Figure 2 is a view, partly in section', of the structure shown in Figure 1, said Fig ure 2 illustrating the mechanism as seen by an observer looking in the direction of the arrow 2 of Figure 1;

Figure3 isa view taken along the plane marked by the line 3-3 ofk Figure 2; and

Figure 4 is a View, partly in section, of the structure shoivn in Figure 1, said Figure 4 illustrating the mechanism as seen by an oliserverV looking in the direction of the arrow 4 of Figure 1.

Figure 5 is a view taken along the plane marked by the line 5-5 of Fig. it.

The-numerals -'10 indicate the sides of the car, While the numerals 11'-'-11 indicate the center sills of said car. kThe numerals 12 and 13 indicate hopper doors, Which are pivoted alonfr the longitudinal axes 15 and 16 respectively.y Said hopper' doors 12 and 13 are shown in their closed positions in full lines in Figures 2 and 4 and in open position by dotted lines in said figures. Said hopper doors are controlled by tivo transverse shafts 17 and 18."

Referring first to the structure shown at the left-hand end of Figure 1, which structure is illustrated at other angles in Figures 2 and 3, it Will be noted that the hopper door 13 is provided With the crank 19. Said crank 19 is mounted upon-the journal 20, which is mounted in a suitable bearing in an axis distant from the pivotal axis 16. Said crank 19 mayk consist of two parallel side members 21 and 22, which are mounted in spaced relation upon journal and pin Ashaft 23 extends the length of hopper door 13 and has the crank 19 non-rotatably mounted thereon. For the purpose of non-rotatablysupporting the crank 19, the shaft 23 may have a 'squared portion mounted Within a square hole -in the journal 20 of crank 19.A Mounted between the tvvo side members 21 and 220i' the crank 19 is the link 24, which may take an angular form as illustrated in the'drawing. The numeral 25 indicates a bearing pin, they numeral 26 a chain guard, and the numeral 27 a pivot pin. 'lhe bearing pin 25 forms a bearing for sheave 30 land'also carries one end of the guard member 26, the other end of said guardv being carried by the pivot pin 27. Saidvpivotpin 27, pivotally connects link 24 with dump door 12.r A chain 31 is connected at one end to the pin 31 and at its other end is connected to the shaft 17 by any suitable attaching means 32. The' chain 31 should be of suflicient length to permit the dumpy doors 12 and 13 to assume their open position, as indicated in dotted lines in Figure 2. To move said dump doors 12 and 13 to closed position, the chain 31 is Wrapped upon shaft 17,y as indicated in Figures 2 and 3.

Referring to the structure at the righthand end yof, Figure 1, which structure is pin 34 located in an axis distant from the i io pivotal axis 1h.l AThe link 33 may take the angular form illustrated in the drawing. Connected to the door 12 on the journal 35 is the crank 36, which may consist of the two side members 37 and 3S. Said journal 35 may be non-rotatably mounted upon the shaft 23. Said side members 37 and 38 may be spaced apart upon the bearing 35 by any suitable means and are spaced apart at their outer ends by the end of the link 33. Said link 33 and side members 37 and 38 may be rotatably connected together by means of the pivot pin 39.

At chain et() is provided, one end of which is connected to the trai'isverse shaft 18 by any suitable attaching means 11. The other end of said chain 40 4may be connected to the framework of the car by any suitable attaching means 42. Said chain 40 forms a loop underlying the crank 36 and link 33 when the dump doors are in closed posit-ion and has the function of tripping the dump door mechanism, whereby the car may be dumped with a practically 4instantaneous motion. The loop of chain 4:0 has been illustrated as lying in a plane substantially longitudinally of the car, which is substantially transverse to the general direction of link 33 and crank 36.

TWhen the dump doors are in closed position as illustrated in full lines in Figures 2 and ll, the Weight of the lading Within the car Will tend to force bearings .43', 27, 341 and 39 downwardly, which action in cooperation with the cranks 19 and 36 Will tend to force the dump doors together and hold saine closed. When it is desired to cans the dumping of the car, the shaft 18 will be rotated to shorten the loop of chain 40, lthereby raising crank 3G. Raising of crank 36 will result in the clockwise rotation of shaft 23 as viewed in Figure 4, which is .a.counter-clockwise rotation as viewed in 'Figure 2.

By reasonvof the non-rotatable connection o-f cranks 19 and 36 with shaft 23, crank 19 will be rotated at the same time that crank 36 is rotated. When pivot means 39 and 23 Lhave been raised above dead center, the practically instantaneous Opeliing of the dump doors 12 and 13 Will rcsult. The opening movement of dump doors 12 and 13 will exert a pull upon chain 31 and Will cause said chain to rotate shaft y 17, whereby said chain will become unraising said doors.

from the dotted line position shown in Figure 4t to the full line position shown in said ligure, the ends of crank 36 and link 33 which are connected together will move within the loop provided by chain 40, whereby the parts are located foi trippinfr action When the shaft 18 is again rota-ted for dumping functionsi By reason of the fact that separate shafts are provided for closing the dump doors and for causing the opening thereof, the necessity for special safet,7 devices is rendered unnecesary. lt will be clear that the operating shafts 1T and 13, instead of being located at opposite ends of the dump doors, may be located adjacent to one end thereof. The illustrated construction is preferred` however, for the reason that simplicity of construction and operation are secured by said arrangement.

By reason of the fact that the releasing chain 4() is arranged in a loop adapted to underlie the operating crank 36, there is a minimum chance of interference of the chain 10 vvith the operating parts of the cai'. This construction is simple and is very little liable to get out of order in service.

One einbodiii'ientof the present invention has been described in detail. Many modifications irill occur to those skilled in the art. 1t is intended iii this patent to cover all such modifications that fall Within the scope of the invention as defined bythe appended claims.

lllliat is claimed is:

1. Dump car construction comprising 'a pair of dump doors, a pair of rotatable shafts, said dump doors being provided with link mechanism for locking same in closed position and permitting the ypractically instantaneous opening thereof, one of said shafts being provided with iiexible means for operating said doors to close saine and move said link mechanism to holding position, and the other of said shafts being provided Witli mea-ns for operating said link mechanism to cause said doors to move to open position.

2. Dump car construction comprising a i pair of doors, a pair of mechanisms operatively associated with said doors, eacli of said mechanisms comprising a crank and a link co-operating to hold said doors vclosed under the influence of gravity, said cranks being constrained to operate in unison, flexible means located at one end of said doors for raising one of said cranks against the influence of gravity and flexible means located at the other'end of said doors for 3. Dump car construction comprising a. pair of doors, a pair 0f mechanisms operatively associated with said doors, each of said mechanisms comprising a crankr and a link co-operating to hold said doors closed under the linfluence ot gravity, said cranks being constrained to operate in unison, ilexible means located at one end of said doors for raising one of said cranks against the influence of n'ravity, and flexible means located at the other end oit said doors `for moving said doors to closed position and said mechanisms to door holding` position.

Dump car construction comprising dump door means, link mechanism operatively associated therewith adapted to occupy a position in which it exerts forces under the influence of gravity for holding said door means closed, and a flexible member lying in a plane transversely of said link mechanism adapted to enclose a portion of said link mechanism and upon operation of said flexible member to raise said link mechanism against the force of gravity `to cause the opening of said door means.

5. Dump car construction comprising dump door means, link mechanism extending transversely7 of the car adapted when in a predetermined position to hold said door means closed under the influence of gravity, and a flexible member having-a loop extending transversely or" said link mechanism adapted to raise said link mechanism against the force of gravity to cause the rapid opening ot said door means.

G. Dump car construction comprising dump door means, a pair of operating mechanisms therefor, said mechanisms having parts constrained to move in unison, each ot' said mechanisms comprising links for urging said door means to closed position under the influence of gravity, and a pair of tlexible members, one of which is operative to move said door means to closed position and the other of which is adapted to control said mechanisms to raise same against the lorce ot' gravity to cause the opening of said door means, said last mentioned yilexible member including a loop adapted to be lengthened or shortened, said loop underlying one oil said link mechanisms and adapted to trip said mechanism upon the shortening of said loop.

7. Dump car construction comprising dump door means, a pair of operating mechp @anisms there'tor, said mechanisms having parts constrained to move in unison, each of `said mechanisms comprising links for urging said door means to closed position under the influence of gravity, and a pair of iiexible members, one ot' which is operative to movesaid door means to closed position and the other of which is adapted to control said mechanisms to raise same against,v the force of gravity to cause the opening of said door means, said latter mentioned flexible'member including a loop lying in a plane transverse to its corresponding link mechanism and being adapted to operate its said link mechanism against the force of gravity to trip said door means.

8. YDUIIIP Car construction comprising dump door means, operating mechanism therefor, said mechanism comprising means forfurging said door means to closed position under the influence of gravity, and a pair of flexible members, one of Which is operated to move said door means to closed position and the other of which is adapted `to control saidv mechanism to raise same against the forcefof gravity to cause the opening ot said door means, said other 'flexible member comprising a loop lying substantially in a plane extending longitudinally of the car.

9. Dump car construction comprising dump door means, mechanism tor controlling `the closing and the practically instantaneous opening thereof, said mechanism including a crank and a link operatively associated With said door means, llexible means for raising said mechanism against the force of gravity to a position to hold said door means closed, and flexible means adapted to operate said mechanism against the force of gravity tocau'sel the practically instantaneous opening of said door means,

said last mentioned flexible means comprising a Aloop adapted to underlie said crank transversely thereof.

l0. Dump car construction comprising dump door means, mechanism` operative under the influence of gravity when in a predetermined position rto hold said door means closed, and a flexible member having a loop portion hanging substantially longitudinally of the car and underlying said mechanism, and means for controlling thev dimensions ot said loop portion to raise said mechanism against the force of gravity to cause the rapid opening of said door means.

Signed at Chicago, illinois, this 15th day ot December, 1922.

" DAVD HINDAHL. 

